Section 101 Requirements

Section 101 specifies four independent categories of inventions or discoveries that are patent eligible:  processes, manufactures, machines, and compositions of matter.

Congress plainly contemplated that the patent laws would be given wide scope,” Diamond v. Chakrabarty, 447 U. S. 303, 308, in order to ensure that “ ‘ingenuity should receive a liberal encouragement,’ ” id., at 308–309.

The Supreme Court’s precedents provide three specific exceptions to §101’s broad principles: laws of nature, physical phenomena, and abstract ideas.

While not required by the statutory text, these exceptions are consistent with the notion that a patentable process must be “new and useful.”

The §101 eligibility inquiry is only a threshold test.  Even if a claimed invention qualifies in one of the four categories, it must also satisfy “the conditions and requirements of this title,” §101(a), including novelty, see §102, non-obviousness, see §103, and a full and particular description, see §112.

35 U.S.C. 103 Rejections for Obviousness.

35 U.S.C. 103 Conditions for patentability; non-obvious subject matter.

(a) A patent may not be obtained though the invention is not identically disclosed or described as set forth in section 102 of this title, if the differences between the subject matter sought to be patented and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art to which said subject matter pertains. Patentability shall not be negatived by the manner in which the invention was made.

35 U.S.C. 102 Rejections.

Inventions must be novel, i.e. not invented or described publicly before.

35 U.S.C. 102 Conditions for patentability; novelty and loss of right to patent.

A person shall be entitled to a patent unless -

(a) the invention was known or used by others in this country, or patented or described in a printed publication in this or a foreign country, before the invention thereof by the applicant for patent, or

(b) the invention was patented or described in a printed publication in this or a foreign country or in public use or on sale in this country, more than one year prior to the date of the application for patent in the United States, or

(c) he has abandoned the invention, or

(d) the invention was first patented or caused to be patented, or was the subject of an inventor’s certificate, by the applicant or his legal representatives or assigns in a foreign country prior to the date of the application for patent in this country on an application for patent or inventor’s certificate filed more than twelve months before the filing of the application in the United States, or

(e) the invention was described in – (1) an application for patent, published under section 122(b), by another filed in the United States before the invention by the applicant for patent or (2) a patent granted on an application for patent by another filed in the United States before the invention by the applicant for patent, except that an international application filed under the treaty defined in section 351(a) shall have the effects for the purposes of this subsection of an application filed in the United States only if the international application designated the United States and was published under Article 21(2) of such treaty in the English language; or

(f) he did not himself invent the subject matter sought to be patented, or